The two-dimensional B-spline approach recently developed has been applied to calculations of absorption spectra from the n = 3 manifold states of Li atoms in magnetic fields of white dwarfs. A total of 28 magnetized atomic states of five symmetries, 20±, 2(− 1)±, and 2(− 2)+, for this atomic system are involved in the current calculations. Wavelengths and oscillator strengths are presented for 60 transitions as a function of magnetic fields ranging from 2.35 to 2350 MG, typical of magnetic white dwarfs. Zeeman spectral lines of all these transitions lie in the region of ultraviolet, visible light, and infrared except for the six transitions, in which energy levels of the initial and final states are inversed at some magnetic field strength. Our results in the field-free case are compared to available data in the literature. Excellent agreement is observed between our spectral data and those from the NIST data base as well as the other theoretical calculations in the field-free case. The present spectral data are applicable to modelling discrete atomic spectral lines in the magnetic white dwarf atmospheres with lithium included.

中文翻译：

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白矮星磁场中锂原子 n = 3 多态的吸收光谱

最近开发的二维 B 样条方法已应用于计算白矮星磁场中锂原子 n = 3 流形状态的吸收光谱。当前计算中涉及该原子系统的总共 28 个磁化原子态，具有 5 个对称性，即 20±、2(−1)± 和 2(−2)+。给出了 60 次跃迁的波长和振荡器强度，作为磁场范围从 2.35 到 2350 MG 的函数，这是典型的磁性白矮星。所有这些跃迁的塞曼谱线都位于紫外、可见光和红外区域，除了六个跃迁，其中初始和最终状态的能级在一定的磁场强度下反转。我们在无现场情况下的结果与文献中的可用数据进行了比较。在我们的光谱数据与 NIST 数据库中的光谱数据以及无场情况下的其他理论计算之间观察到了极好的一致性。目前的光谱数据适用于模拟包含锂的磁性白矮星大气中的离散原子光谱线。